and and stockton is poised to become the most populous city in the nation to enter bankruptcy when its trial begins today in federal court. creditors who lent stockton money are challenging its chapter 9 bankruptcy petition, but most observers say the city of 300,000 will be successful. its largest creditors are bond insurers who helped the city refinance pension debt. police in south san francisco are searching for a serial arsonist who started three fires in the city over the weekend. police said two fires were lit in orange park on memorial drive and a third was started near the 500 block of el camino real. fiske all three fires were quickly extinguished and caused little damage, police said. no suspect information was immediately available. police search for arsonist this weekend police said two fires were lit in orange park on immediately available. the san mateo county sheriff's office is warning rash of 'door-knock' burglaries that have occurred in residential neighborhoods around san according to the sheriff's office, potential burglars have been approaching homes and knocking